LCD internal bleeding/crack FAULTS on Latitude 6400 series

I'd like to find out if anyone else is experiencing LCD failures with their Latitude E6430 and E6420 LCD screens. I've seen several screen failures at work that Dell describe as "internal bleeding due to accidental damage". There is an old Vostro V13 thread where 22 users report a very similar issue

http://en.community.dell.com/support-forums/laptop/f/3518/t/19322611.aspx?PageIndex=1

The following users reported issues with their notebooks: Edgarj602,  rhino082,  digs7777,  tkwoo,  nardo1000, SnizzNuke ,  diegolang,  ayeaye, dbb64, RS-IT , csheppt,  Subus,  lensim,  runeash,  Cornelius_B,  jcantanixon,  kwakeham,  Kasrah,  Pedrocrespo,  oshunluvr562,  StephanVierkant,  bobehm

The symptoms they describe are very similar to ours:

• The notebook is treated well and there are no signs of external damage
• Users discover the fault after the notebook lid is opened and then powered up
• Before the fault had occurred, users report that the notebook was either left on the desk after it was shutdown and lid was closed or
• Was put in a notebook backpack after it was shutdown and lid closed
• The fault occurs a few week to a few months after unboxing of the notebook
• The affected users have owned and used notebooks in the past and have not had such issues and have not mishandled their Dell

kwakeham found this video that demonstrates a possible design flaw

Lenovo ThinkPad LCD Stress Test

In the aforementioned thread topmahof  speculates that the hinges on the display panel may be too tight and this causes the screen to flex when it is opened and closed. I think that over tightened hinges can exacerbate a manufacturing defect. have a Latitude E6430 and a Lenovo R61 to compare. I can not open the Dell lid without supporting the base of the notebook as the whole unit tilts back and starts sliding backwards. I can open the lid on the Lenovo with one hand and the hinges are still tight enough to hold the screen upright.

Dell support immediately conclude that the damage must be accidental (i.e. not covered under warranty) after they see a picture of the fault. They do not accept any explanations and refuse to repair the unit free of charge. Their explanation is that they have tested customer's machines in the past and have found the that the fault had occurred due to excessive pressure being applied to the exterior of the screen. They refused to investigate our fault and wouldn't give a reason why (after they had claimed that they've investigated other customers' notebooks so why not ours). They also refuse to disclose their testing methodology or reveal under what circumstances the screen is expected to crack (i.e. how many newton meters of force needs to be applied before the screen cracks, how big or small would the surface area of the pressure point would need to be, etc...)

Here is an example of a screen with "internal bleeding". There is no damage to the exterior